681822 has 12 divisors (see below), whose sum is σ = 1477320. Its totient is φ = 227268.

The previous prime is 681809. The next prime is 681823. The reversal of 681822 is 228186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18922 + ... + 18957.

It is an arithmetic number, because the mean of its divisors is an integer number (123110).

2⁶⁸¹⁸²² is an apocalyptic number.

681822 is an abundant number, since it is smaller than the sum of its proper divisors (795498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681822 is a wasteful number, since it uses less digits than its factorization.

681822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37887 (or 37884 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 681822 is about 825.7251358654. The cubic root of 681822 is about 88.0150628486.

The spelling of 681822 in words is "six hundred eighty-one thousand, eight hundred twenty-two".